Atlas Copco 2901067300 / 2901-0673-00 — EWD50 Electronic Drain Valve Kit

Atlas Copco · EWD50 · Condensate Drain · In stock

The 2901-0673-00 is the OEM part number for the Atlas Copco EWD50 electronic timed drain valve, a direct-fit replacement for oil-injected screw compressor condensate management. The valve removes water condensate from the receiver tank, integrated aftercooler separator and refrigerated dryer sumps to prevent rust, water carry-over into downstream dryers, and contamination of pneumatic networks that feed Allen-Bradley factory automation cells, Siemens SIMATIC lines, Mitsubishi MELSEC panels, Omron SYSMAC workstations and Fanuc CNC pneumatics. KOEED stocks the genuine 2901067300 / 2901-0673-00 kit and ships worldwide for service engineers, system integrators and maintenance contractors who need a like-for-like replacement without re-piping the manifold.

Key Technical Specifications & Overview

The EWD50 is a solid-state electronic drain with a self-cleaning strainer and an integrated ball-valve mechanism that opens on a fixed cycle (factory default) or on a capacitive level-sensed signal. It is rated for continuous duty on the receiver tank low-point of GA, GX and G-series oil-injected screw compressors, and is also fitted to refrigerated dryers, aftercoolers and standalone air receiver tanks. Below is the ledger summary of the rated parameters, all of which are stated on the Atlas Copco nameplate and verified before dispatch.

Application Scenarios — Where the EWD50 Fits

The EWD50 is the workhorse condensate drain on the receiver side of an oil-injected screw compressor package. It is typically installed on the low-point drain boss of the air receiver, downstream of the aftercooler and oil separator, and on the sump of a refrigerated dryer. Because the same compressed-air network usually feeds every pneumatic actuator, sensor and gripper on the production line, a failing drain quickly escalates into moisture reaching the controls that the line depends on.

• Automotive body-in-white and assembly cells — pneumatic grippers, clamps and vacuum cups on Allen-Bradley and Siemens lines are highly moisture-sensitive; a single failed EWD50 can take down an entire weld cell.
• CNC machining and metal-cutting — air-blast, tool-changing and chuck-actuating pneumatics on Fanuc and Mitsubishi CNCs require clean, dry supply; condensate carry-over causes spindle reference drift and tool-length calibration errors.
• Food & beverage and pharmaceutical packaging — stainless fittings and clean air networks on Omron and KEYENCE vision inspection lines fail closed when rust or biofilm blows downstream from a sludged drain.
• Robotics and material handling — Yaskawa and Panasonic robot controllers rely on dry air for end-effector pneumatics; the EWD50 is the cheapest insurance against robot stoppages.
• Process control and skid packages — Schneider Modicon and Altivar cabinets on chemical, water-treatment and oil-and-gas skids sit in unconditioned plant rooms; receiver-tank moisture has to be vented reliably every shift.
• Standalone receiver tanks, aftercoolers and refrigerated dryers — any low-point sump on a non-compressor vessel where timed discharge is required.

Integration & Wiring Notes

The EWD50 is electrically simple but mechanically unforgiving. Two items must be confirmed at the time of RFQ: supply voltage (24 V DC vs. 110–230 V AC variant) and thread standard (NPT vs. BSP). The kit is a direct mechanical replacement for the previous EWD30 / EWD40 generation on most GA packages, so existing manifold adapters can usually be retained.

Installation & Commissioning Tips

1. Isolate and depressurise the receiver before removal. Open a downstream ball valve to confirm zero pressure on the drain boss; residual condensate will drip even with the breaker off.
2. Verify the thread standard on the existing boss (NPT vs. BSP). Mixing thread forms is the single most common cause of a leaking replacement — the threads will seat but never seal under cycle pressure.
3. Fit a new sealing washer from the kit between the valve body and the receiver boss. Re-using the old copper washer is a false economy and is the typical root cause of a slow seep that mimics a tank problem.
4. Hand-tighten the valve body into the boss, then a quarter-turn with a strap wrench — do not use pipe dope on the EWD50 body as it can migrate into the ball-valve seat.
5. Wire the supply to the labelled terminals on the timer board, observing the voltage variant. Apply power and press the manual test button — you should hear a distinct click and see condensate discharge within two seconds.
6. Set the drain interval to the OEM default unless site conditions require adjustment. Shorter intervals waste air; longer intervals allow carry-over. For high-humidity tropical sites, halving the default interval is normal practice.
7. Commission the upstream dryer in parallel: confirm the dew-point sensor reads within spec on the control panel and that no alarms are latched on the connected Siemens or Schneider HMI.
8. Log the replacement in the maintenance system with date, compressor serial, voltage variant and strainer condition. This is the audit trail that KOEED recommends for any OEM service event.

Procurement, Warranty & Lead Time

KOEED treats the 2901067300 / 2901-0673-00 as a stocked service part rather than a project item. Quotation is free, formal and in writing — there is no live list price shown on this page because KOEED is a quote-driven distributor, not an e-commerce reseller. The fastest path to a confirmed unit is to email the part number plus your voltage variant (24 V DC or 110–230 V AC) and the destination country to Moritta@KOEED.COM; we reply with availability, lead time and freight options within 24 business hours.

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